53439 has 8 divisors (see below), whose sum is σ = 72960. Its totient is φ = 34776.

The previous prime is 53437. The next prime is 53441. The reversal of 53439 is 93435.

It is an interprime number because it is at equal distance from previous prime (53437) and next prime (53441).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53439 - 2¹ = 53437 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49 + ... + 330.

It is an arithmetic number, because the mean of its divisors is an integer number (9120).

2⁵³⁴³⁹ is an apocalyptic number.

53439 is a deficient number, since it is larger than the sum of its proper divisors (19521).

53439 is a wasteful number, since it uses less digits than its factorization.

53439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429.

The product of its digits is 1620, while the sum is 24.

The square root of 53439 is about 231.1687695170. The cubic root of 53439 is about 37.6662837911. Note that the first 3 decimals are identical.

The spelling of 53439 in words is "fifty-three thousand, four hundred thirty-nine".